Malicious PDF — malware analysis report

Static analysis result for SHA-256 009f6fd353adecfb…

MALICIOUS

PDF

92.7 KB Created: 2021-07-24 21:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43dabeeddafba01fbd6eecb4a445d1f4 SHA-1: b766f31293ad75b388fb788d1edb10228bb8ad12 SHA-256: 009f6fd353adecfbb04b4b1af37945217ca4f7755c77980c330727eb691563fd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded links, with several heuristics flagging them as pointing to compromised CMS uploads and disposable hosting. These links likely serve as lures for phishing or to download further malicious content. No scripts were extracted, but the presence of multiple suspicious URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kumsalgame.com/calisma2/files/uploads/gunozeri.pdf In PDF document text
    • http://longearedhounds.com/clients/65743/File/nawixotabejakegoki.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/86385087921.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/20598839404.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/rugonazubusofuz.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16088f87201242---34259404700.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/91510484678.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8243a49fb---26627658023.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c450fd1861---97464822324.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c967cfd95---61300759525.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/pram116t5f4n581mimv10kuf1l/97259733996.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/29407740888.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/53076414776.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dca320b5---winedunarola.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c017ee11cd8---soxokoludigamo.pdfPDF link annotation
    • http://imhkayseri.com/resimler/files/pegowidativ.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/zoxazeledudafe.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d14f5bbe2---47741021627.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/79881693595.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/72050726843.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f40ab704071---46083431527.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/63049762255.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/53282909696.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/78863000760.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ei8o2njkfhmqjlbhlr3cqhhs44/zuvudowovijuxewir.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/kosisuzejim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+is+glass+ionomer+cement+used+forPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 16984 bytes
SHA-256: e5f26291a8d40f4cc4170e12fdcc25d264b363fe5648df099dd2e7dade239965
font_01_sfnt_off00013072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 11016 bytes
SHA-256: c79ce2a8ac8ab0d125eb68a29e73754068f1910f1c92a320c09055c0f21b6cbb
font_02_sfnt_off000149a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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